OK, Ive been into the shed for a proper look. This bike is Ritchey tubing, and has the rear canti hanger. FWIW the serial no is H6H0 0211 stamped on the BB shell. And it also has Breeze rear dropouts. Still has the original Manitou Mach 5s and wheel set, but have changed the drivetrain to M900 XTR and XTR V-brakes. I am led to believe it was some sort of US team issue or replica. It measures up to be around 18" with about 71.5 & 74 angles.